JP6426892B2 - Valve body removing device and valve body removing method - Google Patents

Description

  The present invention relates to a valve body removing device and a valve body removing method for removing a valve body of a valve device connected to an existing fluid pipe in an uninterrupted state.

  Conventionally, valve devices, such as a gate valve, are provided in existing fluid pipes, such as a water main, etc., and it can interrupt | block the fluid pipeline of an existing fluid pipe. For example, in the sluice valve device, the valve main body including the valve body for interrupting the fluid line and the operation shaft for operating the valve element, etc., largely protrudes relative to the fluid line because of its structure. The working case encloses the whole parting valve device in a sealed state, for example, when the ability to shut off the fluid line is reduced due to the end of life, or when the parting valve device becomes unnecessary to the fluid line. To remove the sluice valve device from the pipeline and arrange the fluid pipe, or to use the sluice valve device only as a fluid pipe, or to reuse the sluice valve device in the future as a sluice valve device Removal work is being done to remove only the main part.

  As a method of enclosing the whole sluice valve device with the work case and removing the valve body while leaving the pipe line part, for example, the sluice valve and the fluid pipe near the sluice valve are sandwiched from above and below There is a system in which the valve main body portion is removed from the pipeline portion in the working case by being mounted in a watertight manner on the outer periphery of the fluid conduit in the vicinity of the valve and removing means of the valve main body portion provided in the working case. (For example, refer to patent documents 1 and 2).

JP, 2012-207719, A (page 6, FIG. 6) JP, 2007-177945, A (page 6, FIG. 9)

  However, in Patent Documents 1 and 2, the work valve formed by dividing the fluid pipe into an upper part and a lower part seals the gate valve device together with the fluid pipe in the vicinity of the gate valve device from above and below. Need to be covered. Therefore, it is necessary to excavate the buried ground until the gate valve device and the fluid channel near the gate valve device are exposed, and to secure a sufficient work space, which requires a great deal of time for the digging operation and the backfilling operation. There is a problem of reduced efficiency.

  The present invention was made in view of such problems, and a valve body removing apparatus and a valve body removing method capable of reducing the time spent on digging work and backfilling work and enhancing work efficiency. Intended to provide.

In order to solve the above-mentioned subject, the disc removal device of the present invention,
From a valve device comprising a conduit body that constitutes a conduit component together with a fluid pipe, and a valve main body connected to the conduit body and capable of closing the conduit body, the valve in an uninterrupted state In the valve body removing device for removing the main body,
The valve body removing device includes a work case for sealing the valve body portion to the connection portion between the conduit body and the valve body portion in a sealed state, and the valve body portion at least in the work case. A valve moving means for moving the valve box portion constituting the valve device in the axial direction;
The working case is a separate body from the working case, and is supported by a supporting device disposed so as to sandwich the valve main body from both sides using the upper side of the outer peripheral surface of the duct forming member. It is characterized by becoming.
According to this feature, the working case is hermetically sealed from the valve body to the connecting portion between the conduit body and the valve body, and is disposed on both sides of the valve body. Since the working case is supported by the supporting device using the upper side of the outer peripheral surface of the duct forming member, the valve body can be disconnected only by excavating the buried ground to such an extent that the outer peripheral surface upper side of the duct forming member is exposed. We can carry out removal work. Therefore, time spent on digging operation and backfilling operation is reduced, and work efficiency is improved.

The work case is formed with a bottom surface having an opening surrounding from below the flange located at the upper end of the conduit main body, and the support device is an up-and-down extendable support portion for supporting the work case. It is characterized by having.
According to this feature, the support device presses the bottom surface having the opening in the working case to the flange side located at the upper end of the conduit main body by the extension of the support portion, and the work case is reliably secured by the support device and the flange. Can be held.

The support device is characterized in that it has a curved support surface having substantially the same curvature as the tube outer peripheral surface of the conduit component.
According to this feature, the outer peripheral surface of the conduit component and the curved support surface of the support device contact in a large area, and not only the local component is not applied to the conduit component, but the installation position can be freely made. It can be set.

The working case has a plurality of divided structures attachable from the side of the valve device, and the support device has a supporting portion for supporting the plurality of divided structures from below. It is characterized by
According to this feature, since all the divided structures are pushed up by the support portion, no deviation occurs in the divided structures even when a partial load is applied to the divided structures, and the sealing performance is enhanced. Can be maintained.

The supporting device is disposed in the vicinity of a flange to which the duct forming member on the fluid pipe axis is connected, and a contact portion to which a bolt for fastening the flanges can be abutted is formed at a part of the supporting device. It is characterized by being done.
According to this feature, since the support device is fixed by the bolt to the flange that connects the channel component on the fluid channel axis, the support device can be held securely when the working case is attached.

In order to solve the above-mentioned subject, the disc removal method of the present invention,
From a valve device comprising a conduit body that constitutes a conduit component together with a fluid pipe, and a valve main body connected to the conduit body and capable of closing the conduit body, the valve in an uninterrupted state A method of removing a valve body for removing a main body,
A sealing step of sealing in a sealed state with a first divided case from the valve main body to a connection portion between the conduit main body and the valve main body;
A connecting step of sealingly connecting a second divided case on the first divided case;
The first divided case is separated from the first divided case by a supporting device disposed so as to sandwich the valve main body from both sides using the upper side of the outer peripheral surface of the conduit component. Supporting the second divided case.
The method may further include the step of supporting the first divided case by the support device prior to the connecting step of connecting the second divided case on at least the first divided case.
According to this feature, the work case is supported by utilizing the upper side of the outer peripheral surface of the duct component by the support devices arranged on both sides across the valve main body, so that the outer peripheral surface upper side of the duct component is It is possible to carry out the valve body removing work in an intermittent flow state only by excavating the buried ground to such an extent that it is exposed. As a result, time spent for digging operation and backfilling operation is reduced, work efficiency is improved, and the first divided case and the second divided case do not tilt during the valve body removing operation, and the valve body can be safely It can be removed.

It is a front view which shows a mode that the buried ground was excavated until the upper part of a fluid pipe, a gate valve apparatus, and a connecting pipe in Example 1 was exposed. It is a front view which shows the state which mounted the support apparatus in Example 1 in the outer peripheral surface upper side of a connection pipe | tube. FIG. 2 is a side view showing the support device in Example 1; FIG. 3 is a cross-sectional view taken along the line A-A showing the support device in the first embodiment. It is a front view which shows the state which supported the division structure on the support apparatus in Example 1. FIG. It is a top view which shows a division | segmentation structure. (A) is a side view which shows a division | segmentation structure, (b) is a side view which shows one division | segmentation structure. It is a side view which shows the state which supported the division structure on the support apparatus in Example 1. FIG. It is a partial cross section side view which shows the state which attached the working valve apparatus to the division structure. It is a partial cross section side view which shows the state which supported the valve body removal apparatus on the support apparatus in Example 1. FIG. It is a partial cross section side view which shows a mode that a valve main body part is removed by the valve body removal apparatus. (A) is a side view which shows the support apparatus in Example 2, (b) is a front view similarly. It is a front view which shows the state which mounted the support apparatus in Example 2 in the outer peripheral surface upper side of a connection pipe | tube. It is a side view which shows the state which mounted the support apparatus in Example 2 in the outer peripheral surface upper side of a connection pipe | tube. FIG. 14 is a side view showing the support device in Example 3; It is a side view which shows the state which mounted the support apparatus in Example 3 in the outer peripheral surface upper side of a connection pipe | tube. It is a front view which shows the state which mounted the support apparatus in Example 3 in the outer peripheral surface upper side of a connection pipe | tube.

  EMBODIMENT OF THE INVENTION The form for implementing the valve body removal apparatus which concerns on this invention, and a valve body removal method is demonstrated below based on an Example.

  The disc removal device and the disc removal method according to the first embodiment will be described with reference to FIGS. 1 to 11. As shown in FIG. 1, in the present embodiment, a gate valve device 3 (valve device) capable of opening and closing a fluid line is connected to the existing fluid lines 2 and 2 ′. The fluid pipes 2, 2 'and the gate valve device 3 are, for example, made of ductile cast iron for water supply buried in the ground, and the fluid pipes 2, 2' are formed in a substantially circular shape in cross section, and the inner peripheral surface Is covered with a mortar layer. The fluid pipe and the valve device according to the present invention may be made of metal such as cast iron or steel, asbestos, concrete, vinyl chloride, polyethylene or polyolefin. Furthermore, the inner circumferential surface of the fluid pipe may be coated with, for example, an epoxy resin, not limited to the mortar layer, or an appropriate material may be coated on the inner circumferential surface of the fluid pipe by powder coating. Further, although the fluid in the fluid pipe in the present embodiment is fresh water, the fluid is not limited to the above embodiment, and, for example, a gas-liquid mixture of gas or gas in addition to industrial water, agricultural water, sewage etc. It does not matter.

  As shown in FIG. 1, the sluice valve device 3 is composed of a conduit main body 11 and a valve main body 12. The conduit body 11 projects in a direction different from the pipe axis of the pipe portion 13 communicating with the fluid pipes 2 and 2 ′, the flange portions 14 and 14 ′ integrally formed on the pipe portion 13, and the pipe portion 13 It comprises a cylindrical valve box part 15 and a pipe line part flange 16.

  The valve body portion 12 includes a valve body 17 (see FIG. 11) capable of closing the conduit portion body 11, a valve lid flange 18, a valve lid 19 integrally formed with the valve lid flange 18, and a valve lid 19 The operation unit 20 is protruded from the upper surface and configured to open and close the gate valve device 3 from the outside, and the operation unit 20 is attached and detached via a packing (not shown) for sealing between the valve cover 19 and the same. It is joined possible. Further, the conduit body 11 and the valve body 12 are provided with bolts and nuts 60 via a packing (not shown) for sealing the conduit flange 16 and the valve cover flange 18 of the conduit body 11. Are detachably joined.

  Further, the gate valve device 3 and the fluid pipes 2, 2 'are connected via connection pipes 21, 21'. The connection pipes 21 and 21 'have flanges 22 and 22' at one end in the longitudinal direction and receptacles 23 and 23 'at the other end, and these flanges 22 and 22' and both ends of the gate valve device 3 are provided. The flanges 14 and 14 'are joined in a sealed manner via packing (not shown), and the flanges are fastened together by bolts and nuts (not shown). The fluid pipes 2, 2 'are sealingly joined to the inlets 23, 23' of the connection pipes 21, 21 'via packings (not shown) by means of push rings 24, 24' fixed to the ends. At the same time, the flanges are fastened together by bolts and nuts (not shown). The fluid pipes 2 and 2 'and the conduit portion main body 11 and the connecting pipes 21 and 21' and the push rings 24 and 24 'in the gate valve device 3 constitute the same fluid pipe, and in this embodiment, These are generically defined as a conduit component. Further, in the present embodiment, the members constituting the duct forming member are joined by a flange, joined by a socket and a plug, and joined by using a push ring, but may be joined by welding or the like.

  The valve body removing apparatus and the valve body removing method in the present embodiment are used, for example, at the time of replacement due to deterioration of the valve body 17 and deterioration of the rubber. Hereinafter, the removal process of the valve body 17 is demonstrated in order. First, as shown in FIG. 1, the buried ground is excavated so that the outer peripheral surface upper side of the fluid pipes 2, 2 'is exposed to the vicinity of the center. Subsequently, the bolt and nut 60 for fastening the conduit body 11 and the valve body 12 are replaced with working bolts 25a, 25a, ... and nuts 25b, 25b, ... shown in FIG. The supporting devices 4 and 4 'constituting 1 (see FIG. 10) are installed on the upper side of the outer peripheral surface of the pipe sections 21a and 21a' in the connection pipes 21 and 21 '. The work bolts 25a, 25a,... Incorporate a packing for sealing a bolt hole (not shown) of the pipeline portion flange 16. The bolt holes of the conduit portion flange 16 may be sealed by interposing a seal washer instead of the packing.

  As shown in FIG. 3 and FIG. 4, each of the support devices 4, 4 ′ is a curved support surface 26 a that can be surface-contacted with the outer peripheral surface of the conduit portions 21 a, 21 a ′ in the connection pipes 21, 21 ′. And a pair of support portions 27 and 27 'provided on the upper portion of the leg portion 26 and extending telescopically upward, and mounted so as to be bridged between the support portions 27 and 27'. It is mainly composed of a plate 28.

  As shown in FIGS. 3 and 4, each support 27 (27 ′) is formed on the upper part of the leg 26 and has a cylindrical pedestal 29 on which an internal thread (not shown) is formed. , And a height adjustment member 30 (30 ') having a male screw (not shown) screwed to the female screw (not shown), and the connecting tube 21, 21' by screwing back and forth of the height adjusting member 30. The distance between the support 28 and the plate 28 placed on the support 27 can be adjusted.

  Subsequently, as shown in FIG. 5 and FIG. 8, a divided structure which is a first divided case which constitutes a part of the working case 5 on the plates 28 and 28 ′ in the support devices 4 and 4 ′. Place 31 and 32.

  As will be described later, as shown in FIG. 10, the working case 5 is mainly composed of divided structures 31, 32, mating flange 49, working valve device 50, cylinder 52, and upper lid 54. ing. As shown in FIGS. 6 and 7, a circular flange portion 44 is formed on the top of the divided structures 31 and 32, and a work valve described later can be attached. The divided structures 31 and 32 and the flange portion 44 are not limited to the cylindrical shape, and may be cylindrical members such as substantially oval, substantially oval, and substantially square in cross-sectional shape and plan shape.

  As shown in FIGS. 7 and 8, the split structures 31 and 32 have plate-like projecting pieces 34 and 34 formed at positions away from the joint end, respectively, and a plurality of these projecting pieces 34 and 34 are used. The bolts 33a, 33a,... Are inserted into the provided holes 34a, 34a,... And are tightened by the bolts 33a, 33a, ... and the nuts 33b, 33b,. It becomes cylindrical shape to surround.

  Further, as shown in FIG. 6, arc-shaped notches 31 b and notches 32 b are formed on the bottom surfaces 31 a and 32 a of the divided structures 31 and 32 respectively, and these notches 31 b and 32 b are formed. The opening 47 is formed to surround the side of the pipe line flange 16 of the valve box 15 of the gate valve device 3. In addition, working bolts 25a and 25a for fastening the pipe section flange 16 of the pipe section body 11 to the valve cover flange 18 of the valve body 12 and the bottom surfaces 31a and 32a of the divided structure body 31 and 32. A plurality of through holes 64, 64,... Are formed at positions corresponding to, and nuts 25b, 25b,. Although the bottom surfaces 31a and 32a are flat and are continuously formed on the circumference, the present invention is not limited to this, and for example, may be an uneven surface shape or may be formed intermittently.

  A substantially semicircular sealing rubber 35 is fixed to the inner peripheral surface of the divided structural body 31 along the outer peripheral surface shape of the pipeline portion flange 16, and similarly to the inner peripheral surface of the divided structural body 32. , And a substantially semicircular sealing rubber 35 along the outer peripheral surface shape of the conduit portion flange 16 is fixed, and these sealing rubbers 35, 35 are bolt 33a, 33a, ... and nuts 33b, 33b, ... The end portions of the divided structural members 31 and 32 are brought into close contact with each other by tightening. As shown in FIG. 5, the sealing rubber 35 abuts over the side surface 16 b of the pipeline flange 16, and although not shown, the sealing rubber 35 in the split structure 32 is also similar to the side surface 16 b of the pipeline flange 16. , To prevent the fluid from leaking from the lower side of the divided structures 31 and 32. In addition, the packings 36 and 36 are fixed to the joint surfaces of the divided structure bodies 31 and 32 to enhance the sealing performance between the divided structure bodies 31 and 32. In the sealing process as described above, the divided structures 31, 32 are connected in a sealing manner from the valve body 12 to the valve cover flange 18 and the pipe line flange 16 by tightening the divided structures 31, 32 with each other. become. The sealing rubber 35 and the packing 36 may be integrally formed. Furthermore, the sealing rubber 35 is not limited to one that abuts over the side surface 16 b of the duct portion flange 16, and the fluid from the lower side of the divided structures 31, 32 so as to surround a portion of the duct portion main body 11. Leakage may be prevented.

  Further, as shown in FIGS. 7 (a) and 7 (b), a plurality of operation protrusions 40, 40,... Protruding outward are formed on the lower side of the divided structures 31, 32. The operation protrusions 40, 40, ... have a hollow structure that penetrates into the divided structures 31, 32, and on the inner peripheral surface of this hollow structure, a female screw not shown here is formed and can be operated from the outside The lower flange fixing bolts 42, 42,... Are screwed in such a manner that their tip portions 42a, 42a,. When the flange lower fixing bolts 42, 42,... Protrude, the tip portions 42a, 42a,. The lower flange fixing bolts 42, 42,... May be screwed on the divided structures 31, 32 in a sealing manner.

  Furthermore, a plurality of operation protrusions 41, 41,... Are formed on the lower side of the divided structures 31, 32, spaced upward from the operation protrusions 40, 40,. Similarly to the above, flange upper fixing bolts 43, 43, ... are screwed in such a manner as to be able to penetrate inside the divided structures 31, 32 in a sealing manner with respect to the divided structures 31, 32. When the flange upper fixing bolts 43, 43,... Protrude, the tip end portions 43a, 43a,.

  As shown in FIG. 7B and FIG. 8, a jig 45 which is externally inserted into the working case 5 from the outside and which can be operated from the outside is attached in a sealing manner substantially at the center of the divided structure 31 in the vertical direction. It is done. Further, as shown in FIG. 7A and FIG. 8, confirmation windows 46 and 46 are sealingly attached to the upper side of the divided structure 32. After removing the valve body 12, the confirmation windows 46, 46 are used for removing the packing remaining on the sealing surface of the pipe line flange 16 or cleaning the sealing surface, or attaching the valve body after replacement. Used when. At this time, one of the confirmation windows 46 is used as an application for the operator to directly view the inside, and the other is used as a light picker. Then, the attachment method of the division | segmentation structures 31 and 32 to the gate valve apparatus 3 is demonstrated. First, the height adjusting members 30, 30, ... of the supporting devices 4, 4 'placed on the outer peripheral surface upper side of the connection pipes 21, 21' are rotated to adjust the supporting devices 4, 4 'to a predetermined height. Do.

  Then, as shown in FIGS. 6 and 8, the conduit flange 16 and the valve cover flange 18 are arranged so that the notches 31b and 32b, ie, the opening 47, surround the conduit flange 16 side of the valve box 15. The split structures 31, 32 are surrounded by the split structures 31, 32 from the side, and the projecting pieces 34, 34 are fastened together by the bolts 33a, 33a, ... and the nuts 33b, 33b, .... At this time, the sealing rubbers 35 and 35 are in pressure contact with the side surface 16 b of the pipe line flange 16, and the ends of the sealing rubbers 35 and 35 are in pressure contact with each other. Leakage of fluid from the side, that is, between the conduit body 11 and the opening 47 can be prevented. The sealing rubber 35 may surround not only the pipe line flange 16 but also the outer periphery of the valve cover flange 18.

  As shown in FIG. 8, in the divided structures 31, 32, the lower surfaces 34b, 34b of the projecting pieces 34, 34 are temporarily placed on the upper surfaces 28a, 28a of the plates 28, 28 of the support devices 4, 4 ' The load is partially supported. Next, as shown in FIG. 5, a plurality of fixing screws 65, 65,... Are formed in the through holes 64, with respect to female screw portions (not shown) formed on the lower surfaces of the working bolts 25a, 25a,. Are engaged with each other to hold the working bolts 25a, 25a,... On the divided structures 31, 32, and in the present embodiment, the working bolts 25a, 25a,. The sealability of the seal washer (not shown) interposed between the members is ensured.

  As a method of holding the divided structures 31, 32 in the gate valve device 3, the flange lower fixing bolts 42, 42, ... and the flange upper fixing bolts 43, 43, ... are tightened, and the tip portions 42a, 42a, The tip end portions 43a, 43a,... Are brought into contact with the lower portion 16a of the pipeline portion flange 16 and the upper portion 18a of the valve lid flange 18, sandwiching the pipeline portion flange 16 and the valve lid flange 18 Hold the divided structures 31, 32.

  Subsequently, the height adjusting members 30, 30, ... of the supporting devices 4, 4 'are further rotated, and the upper surfaces 28a, 28a of the respective plates 28, 28 in the supporting devices 4, 4' The heights of the supporting devices 4 and 4 'are adjusted again so that they abut on the lower surfaces 34b and 34b and the upper surfaces 28a and 28a of the plates 28 and 28 become parallel to the legs 26.

  In addition, the attachment process of the division | segmentation structure 31 and 32 is not restricted to an above-described order. For example, the flange upper fixing bolts 43, 43, ... are tightened in advance, and the tip portions 43a, 43a, ... protruding into the divided structures 31, 32 are supported by the upper portion 18a of the valve cover flange 18, By arranging the supporting devices 4 and 4 ', the above-described procedure for temporarily placing the divided structures 31 and 32 on the supporting devices 4 and 4' may be omitted.

  Also, by rotating the height adjustment members 30, 30, ... of the support devices 4, 4 'in a state where the divided structures 31, 32 are temporarily placed on the support devices 4, 4', the plates 28, 28 are rotated. The divided structures 31 and 32 placed on top of each other may be raised to a predetermined position.

  Furthermore, prior to the step of re-adjusting the height adjustment members 30, 30, ..., the above-mentioned flange lower fixing bolts 42, 42, ... or the flange upper fixing bolts 43, 43, ... are tightened, and their tips .. Or the tip portions 43a, 43a,..., The tip portions 42a, 42a,... Or the tip portions 43a, 43a,. It is also possible to determine that the working case 5 is positioned at a predetermined height based on the contact with the upper portion 18a of the upper case 18a.

  Next, as shown in FIG. 9, a step of sealingly connecting the second divided case on the divided structures 31, 32 which are the first divided case is performed. The second divided case is mainly composed of a fitting flange 49, a work valve device 50, a cylinder 52 and an upper lid 54, which will be described later. In this state, the working nuts 25b, 25b,... Are removed, and the cap portion of the operation portion 20 provided on the upper portion of the valve lid 19 is removed, and a valve suspending bracket 48 constituting the valve moving means is fixed instead. Further, a work valve device 50 provided with a work valve 50c that can be opened and closed is connected to the upper part of the flange portions 44, 44 of the divided structures 31, 32 via a mating flange 49. The work valve device 50 has flanges 50a and 50b at the top and bottom, and the lower flange 50b is fixed to the flange 44 and the mating flange 49 using a bolt and a nut (not shown).

  Next, as shown in FIG. 10, the work valve device 50 and the cylinder 52 are fixed. The cylinder 52 has flanges 52a and 52b at the top and bottom, and the lower flange 52b is fixed to the upper flange 50a of the work valve device 50 using a bolt and a nut (not shown). Then, the extension rod 53 constituting the valve moving means is attached to the valve suspension fitting 48, and the upper lid 54 through which the extension rod 53 can be inserted is attached to the upper flange 52a of the cylinder 52 in a sealed state. Then, the upper suspension fitting 55 constituting the valve moving means is fixed to the portion of the extension rod 53 exposed from the upper lid 54. Next, the cylinder 52 and the work valve device 50 are filled with a fluid, and the pressure pump 56 is used to construct the inside of the cylinder 52 and the work valve device 50 as a conduit component (fluid pipes 2, 2 ' The fluid pressure is adjusted to substantially the same pressure as the fluid pressure in the main body 11, the connection pipes 21 and 21 ′, and the pressing rings 24 and 24 ′, and the fluid pressure test is performed.

  Then, as shown in FIG. 11, the flange upper fixing bolt 43, in a state in which the pressure in the cylinder 52 and the working valve device 50 and the inside of the pipeline component becomes substantially the same or when the pressure is temporarily released. Are retracted, and the upper suspension fitting 55 and the extension rod 53 are pulled up, and the valve main body 12 is removed from the conduit main body 11. After pulling up the valve main body 12, the operation valve 50c is closed. Then, although not described in detail here, the fluid in the cylinder 52 is discharged, the cylinder 52 is removed from the work valve device 50, and a new valve main body portion is attached to the conduit portion main body 11. In addition, when attaching a new valve main body, it is desirable to assist insertion of the valve main body by assembling a weight not shown to the valve moving means. Furthermore, in the final stage of the insertion of the valve body, it is desirable to use a screw mechanism on the upper lid 54 to insert against the fluid pressure.

  As described above, the valve body removing device 1 has a construction in which the working case 5 is hermetically sealed from the valve body 12 to the pipe flange 16 and the valve lid flange 18, and the valve body The working case 5 is supported by the support devices 4 and 4 'disposed on both sides of the portion 12 using the upper side of the outer peripheral surface of the duct constituting member. Therefore, only by excavating the buried ground to the extent that the upper side of the outer peripheral surface of the pipeline component is exposed, it is possible to carry out the valve body removing operation in an uninterrupted flow state, reducing the time spent on the drilling operation and backfilling operation. As a result, it is possible to safely remove the valve body without tilting the working case 5 during the valve body removing operation. In addition, in the process of filling the cylinder 52 and the working valve device 50 with fluid and adjusting the pressure in the cylinder 52 and the working valve device 50 to substantially the same pressure as the fluid pressure in the conduit component. Even when a large pressure is applied to the work valve device 50, the work valve device 50 can be stably held.

  In addition, a small-diameter opening 47 is formed around the lower portion of the conduit portion flange 16 located at the upper end of the conduit portion main body 11, and the supporting device 4, 4 ' The support devices 4 and 4 'have openings by the extension of the support portions 27 and 27' because they have extendable support portions 27 and 27 'that abut on the lower surfaces 34b and 34b of the 32 projecting pieces 34 and 34. The bottom surfaces 31a, 32a of the divided structures 31, 32 having 47 are pressed against the working bolts 25a, 25a, ... or the pipe line flange 16, and the supporting device 4, 4 'and the pipe line flange 16 work. The divided structures 31 and 32 constituting the case 5 can be reliably held. The bottom surfaces 31a and 32a of the divided structures 31 and 32 may be pressed against any of the working bolts 25a, 25a, ... and the conduit portion flange 16. Furthermore, the step of pressing the bottom surfaces 31a, 32a of the divided structures 31, 32 having the opening 47 by the extension of the support portions 27, 27 'against the working bolts 25a, 25a, ... and / or the pipeline portion flange 16 The embodiment is intended to reinforce the fixing force between the valve device 3 and the divided structures 31, 32 and the working case 5, and the load of the working case 5 can be supported by the supporting devices 4 and 4 '. If this is the case, this step may be omitted, and a gap may be generated between the bottom surfaces 31a and 32a of the divided structures 31 and 32 and the working bolts 25a, 25a, ... and / or the conduit portion flange 16. Absent.

  In addition, since the support devices 4 and 4 'have a curved support surface 26a having substantially the same curvature as the pipe outer peripheral surface of the connection pipes 21 and 21' (pipe line constituting member), Not only the outer peripheral surface upper side and the curved support surface 26a of the support devices 4 and 4 'contact in a large area, and a local load is not applied to the duct component but the installation position can be freely set.

  In addition, since the supporting devices 4 and 4 'push up the projecting pieces 34 and 34 of the divided structures 31 and 32 by the supporting portions 27 and 27', when an unbalanced load is applied to the divided structures 31 and 32. Even in the above case, the divided structures 31 and 32 do not shift, and the sealing performance can be maintained in a high state.

  Next, a disc removal device and a disc removal method according to a second embodiment will be described with reference to FIGS. 12 to 14. The description of the same configuration as that of the above embodiment will be omitted.

  As shown in FIGS. 12 (a) and 12 (b), the support device 104 has a curved support surface 26a that can be in contact with the outer peripheral surface of the pipe sections 21a, 21a 'in the connection pipes 21, 21'. The leg portion 126, the support portion 27, 27 'provided at the upper portion of the leg portion 126 and extending in an expandable manner upward, and the plate body 28 mounted so as to be bridged between the support portions 27, 27'. And is mainly composed of.

  As shown in FIG. 12A, in the leg portion 126, curved contact surfaces 130 and 130 'each having a diameter smaller than that of the support surface 26a are formed in the vicinity of both end portions in the longitudinal direction of the support surface 26a.

  As shown in FIG. 13, the flanges 22 and 22 ′ of the connection pipes 21 and 21 ′ and the flanges at both ends of the gate valve device 3 are attached as the method of attaching the support devices 104 and 104 ′ to the duct forming members. (See FIG. 14) at least two bolts and nuts 70, 70,... (See FIG. 14) for fastening the parts 14 and 14 'are replaced with special bolts 131 and 131'.

  As shown in FIGS. 13 and 14, the special bolts 131 and 131 ′ have auxiliary support portions 131 a and 131 a ′ that come into surface contact with the contact surfaces 130 and 130 ′ of the support devices 104 and 104 ′. The support devices 104 and 104 'have the support surface 26a mounted on the outer peripheral surface upper side of the connection pipes 21 and 21', and the contact surfaces 130 and 130 'mounted on the auxiliary support portions 131a and 131a', The contact surfaces 130 and 130 'serve as the contact portions in this embodiment. According to this, since the supporting devices 104 and 104 'are additionally supported so as to be rotationally restricted on the special bolts 131 and 131', the supporting devices at the time of attachment of the divided structures 31 and 32 in the working case 5 104 and 104 'can be reliably held, and the worker does not have to hold the support devices 104 and 104', and the work efficiency is high.

  Next, a disc removal device and a disc removal method according to a third embodiment will be described with reference to FIGS. The description of the same configuration as that of the above embodiment will be omitted.

  As shown in FIG. 15, the support device 204 has a leg portion 226 having a curved support surface 26 a that can be surface-contacted with the outer peripheral surface of the conduit portions 21 a and 21 a ′ in the connection pipes 21 and 21 ′. It is mainly composed of a support portion 27, 27 'provided at the upper portion of the portion 126 and extending telescopically upward, and a plate 28 mounted so as to be bridged between the support portions 27, 27'. ing.

  As shown in FIG. 15, in the leg portion 226, notches 132 and 132 'of curved surface shape smaller in diameter than the support surface 26a are formed in the vicinity of both end portions in the longitudinal direction of the support surface 26a.

  As shown in FIG. 16, as a method of attaching the support devices 204 and 204 'to the conduit component, the support devices 204 and 204' place the support surface 26a on the outer peripheral surface upper side of the connection pipes 21 and 21 '. In a state where the flanges 22 and 22 'of the connection pipes 21 and 21' and the flanges 14 and 14 'at both ends of the gate valve device 3 are fastened to at least the upper side of Replace each two with special bolts 133 and 133 '.

  As shown in FIGS. 16 and 17, the special bolts 133 and 133 ′ are adapted to engage with the notches 132 and 132 ′ in the supporting device 204 and 204 ′, and the notches 132 and 132 ′ This is the contact portion of this embodiment. In the support devices 204 and 204 ', the support surface 26a is placed on the outer peripheral surface upper side of the connection tubes 21 and 21', and the special bolts 133 and 133 'are engaged with the notches 132 and 132'. According to this, since the supporting devices 204 and 204 'are engaged so as to be engaged with the special bolts 131 and 131' and regulated so as to restrict the vertical movement and the rotational movement, the divided structures 31 and 32 in the working case 5 are provided. The support devices 204 and 204 'can be reliably held at the time of attachment, and the operator does not have to hold the support devices 204 and 204', and the working efficiency is high.

  Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and any changes or additions may be made without departing from the scope of the present invention. Be

  For example, the valve body removing device 1 in the present embodiment is not limited to the use for removing the valve main body 12 in the gate valve device, and the use application thereof is diverse, for example, from a butterfly valve, a switching valve, a ball valve, a plug, etc. It can be used not only for the purpose of removing the valve body, but also for removing the lid from the conduit body 11 sealed by the lid.

  In addition, the support devices 4 and 4 ′ are not limited to the aspect installed on the outer peripheral surface upper side of the connection pipes 21 and 21 ′, but, for example, in the fluid pipes 2 and 2 ′ that constitute the duct constituting member It may be installed on the outer peripheral surface upper side of the conduit section main body 11. Further, three or more supporting devices 4 may be installed on the upper side of the outer peripheral surface of the conduit component.

  In addition, the support surface 26a of the support devices 4 and 4 'is not limited to the surface shape in contact with the upper side of the outer peripheral surface of the duct forming member, as long as it is installed using the upper side of the outer peripheral surface of the duct forming member For example, the configuration may be uneven, or may be configured to engage with the upper side of the outer peripheral surface of the conduit component.

  Further, the support portions 27 and 27 'in the support devices 4 and 4' are not limited to the screw type height adjustment mechanism as described above, and may be, for example, a hydraulic jack or the like. Furthermore, although two supporting portions 27 and 27 'are provided for each supporting device 4, the number of supporting portions 27 and 27' is not limited to two, and one supporting portion may be provided, or three or more may be provided. Good.

  Further, although the supporting devices 4 and 4 'and the working case 5 have been described as being separately configured, the present invention is not limited to this. For example, the supporting device 4 and 4' may be integrated with the working case 5 It may be

  Moreover, the plate body 28 in the support devices 4 and 4 'is not limited to the structure mounted on the support portions 27 and 27', for example, the support portions 27 and 27 in a state where the support portions 27 and 27 'can rotate. It may be engaged with '. Furthermore, the plate 28 is not limited to an integral shape that is bridged by the support portions 27 and 27 ', and may be divided into a plurality.

  Moreover, the division | segmentation structures 31 and 32 may be divided | segmented into not only 2 division but 3 or more plurality.

  In addition, although the supporting device has been described in a mode in which the lower surface of the working case is supported by the plate body, the invention is not limited thereto. For example, an extendable arm that engages with the leg portion of the supporting device with the side surface of the working case The load of the working case may be supported on the upper side of the outer peripheral surface of the duct constituting member by extending the same. The arm may be provided on the work case side, or may be configured separately from the support device and the work case.

  Further, in the above-described embodiment, the valve body removing device 1 is described in a mode in which the valve body main body is removed from the valve device whose operating portion faces upward at the time of installation. The present invention is also applicable to a valve device in which the hour operation part is directed in the lateral direction.

1 Valve body removing device 2, 2 'Fluid pipe (pipe line component)
3 Gate valve device (valve device)
4, 4 'Support device 5 Case 11 for operation of pipeline section body (pipeline component)
12 valve body part 13 pipe part 14, 14 'flange part 15 valve box part 16 pipe line part flange 17 valve body 18 valve cover flange 19 valve cover 21a, 21a' pipe line part 21, 21 'connection pipe (pipe line constituting member )
24, 24 'Push ring (pipe line component)
25, 25 ... Work bolt and nut 26 Leg 26a Support surface 27, 27 'Support portion 28 Plate 29 Base portion 30, 30' Height adjustment member 31, 32 Split structure (first split case)
34, 34 projecting pieces 35, 35 sealing rubber 36, 36 packing 42, 42, ... flange lower fixing bolt 42a, 42a, ... tip 43, 43, ... flange upper fixing bolt 43a, 43a, ... tip 44, 44 flange Part 47 Opening 48 Valve lifting bracket (valve moving means)
49 mating flange (second split case)
50 Work valve device (second split case)
51 work valve 52 cylinder (second split case)
53 Extension rod (valve moving means)
54 Upper lid (second split case)
55 Top hanging bracket (valve moving means)
104, 104 'Support device 126, 226 Leg 130, 130' Abutment surface 131, 131 'Special bolt 133, 133' Special bolt 204, 204 'Support device

Claims (6)

From a valve device comprising a conduit body that constitutes a conduit component together with a fluid pipe, and a valve main body connected to the conduit body and capable of closing the conduit body, the valve in an uninterrupted state In the valve body removing device for removing the main body,
The valve body removing device includes a work case for enclosing the valve body in a sealed state from the valve body to a connection portion between the conduit body and the valve body, and at least the valve body within the work case. A valve moving means for moving the valve box portion constituting the valve device in the axial direction;
The working case has a first divided case attachable from the side of the valve device, and a second divided case sealingly connected to the first divided case, and the working case Is a separate body, and is supported by a supporting device disposed so as to sandwich the valve main body from both sides using the upper side of the outer peripheral surface of the duct component member, and the supporting device is Having a leg portion in contact with the upper side of the outer peripheral surface of the duct forming member, and a support portion which supports the working case from below to adjust its height and adjust it so as to be parallel to the leg portion. The valve body removal device that is characterized. The work case is formed with a bottom surface having an opening surrounding from below the flange located at the upper end of the conduit main body, and the support portion of the support device extends vertically to support the work case. The valve disc removing device according to claim 1, characterized in that it is possible. The valve body removing device according to claim 1 or 2, wherein the leg portion of the support device has a curved support surface having substantially the same curvature as the pipe outer peripheral surface of the conduit component. The working casing has an attachable plurality of divided structure from the side of the valve device, the supporting portion of the supporting device to support both a plurality of split structure from below The valve disc removing device according to any one of claims 1 to 3, characterized in that   The supporting device is disposed in the vicinity of a flange to which the duct forming member on the fluid pipe axis is connected, and a contact portion to which a bolt for fastening the flanges can be abutted is formed at a part of the supporting device. The valve disc removing device according to any one of claims 1 to 4, characterized in that: From a valve device comprising a conduit body that constitutes a conduit component together with a fluid pipe, and a valve main body connected to the conduit body and capable of closing the conduit body, the valve in an uninterrupted state A method of removing a valve body for removing a main body,
Sealing from the valve body to the connecting portion between the conduit body and the valve body with a first split case attachable from the side of the valve device in a sealed state;
A connecting step of sealingly connecting a second divided case on the first divided case;
The first divided case is separated from the first divided case by a supporting device disposed so as to sandwich the valve main body from both sides using the upper side of the outer peripheral surface of the conduit component. Supporting the second divided case.
Prior to the connecting step of connecting the second divided case onto at least the first divided case, the first divided case is supported from below by the support portion of the supporting device , and the height adjustment is performed. A method of removing a valve body comprising the step of adjusting so as to be parallel to a leg portion in contact with the upper side of the outer peripheral surface of the conduit component .

Images